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Summary

SAW642ANb, Panning, Lekic and Romanowicz (2010) , is a radially anisotropic shear velocity model of the mantel, parameterized in terms of isotropic S velocity (Voigt average) and the anisotropic parameter, xi (VSH2/VSV2). The waveform data used for this model consist of 3-component broad-band surface waveforms (short period corner of 80 seconds and cutoff of 60 seconds) as well as body waveforms (short period corner of 40 s and cutoff of 32 s). The spatial parameterization of the model is the same as SAW642AN , with 16 variably spaced cubic b-splines with depth, and level 4 spherical splines laterally. Model values are percent perturbation relative to the anisotropic reference model PREM500 .

gzipped tarfile (~2.9 MB), includes all necessary model files, including the earlier model SAW642AN, as well as some tools for obtaining model values at specified locations in the mantle and making some basic plots.

SAW642ANB_percent.nc (metadata), is the netCDF binary for the above model expressed as velocity perturbation relative to the PREM500 reference model.

The waveform data used consists of 3-component broad-band surface waveforms (short period corner of 80 seconds and cutoff of 60 seconds) as well as body waveforms (short period corner of 40 s and cutoff of 32 s). The final 124 dataset includes over 120,000 wave packets with over 4 million data points.

Figure, Panning, Lekic and Romanowicz (2010) , shows lateral sections of SAW642ANb of perturbations in Vs for several depths in the mantle.

Citation

Panning, M.P., V. Lekic, and B.A. Romanowicz. 2010. “The importance of crustal corrections in the development of a new global model of radial anisotropy.” J. Geophys. Res. 115.